Analysis

  • max time kernel
    960s
  • max time network
    964s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-09-2024 20:36

General

  • Target

    https://cdn.discordapp.com/attachments/1279538248812728444/1279554286606356606/protected.exe?ex=66d5860a&is=66d4348a&hm=fd051a431948718b24b16f2b533f749a89aa39e46dfbf8ef7b5f09dce7592944&

Malware Config

Extracted

Family

skuld

C2

https://discord.com/api/webhooks/1279552508578238534/-lGdkw-tDuy6Wd-I7APMhPnY3Tp2Oh3ZxzkvZFiG36eu6-pHpBKf4a2y4W0ZpaNYzcmk

Signatures

  • Skuld stealer

    An info stealer written in Go lang.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Downloads MZ/PE file
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of FindShellTrayWindow 38 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument https://cdn.discordapp.com/attachments/1279538248812728444/1279554286606356606/protected.exe?ex=66d5860a&is=66d4348a&hm=fd051a431948718b24b16f2b533f749a89aa39e46dfbf8ef7b5f09dce7592944&
    1⤵
    • Enumerates system info in registry
    • NTFS ADS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4684
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ffcfe1346f8,0x7ffcfe134708,0x7ffcfe134718
      2⤵
        PID:3644
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2172 /prefetch:2
        2⤵
          PID:4020
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2224 /prefetch:3
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2036
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2836 /prefetch:8
          2⤵
            PID:3848
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3416 /prefetch:1
            2⤵
              PID:4624
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3436 /prefetch:1
              2⤵
                PID:4780
              • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5400 /prefetch:8
                2⤵
                  PID:1156
                • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5400 /prefetch:8
                  2⤵
                  • Suspicious behavior: EnumeratesProcesses
                  PID:3668
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5472 /prefetch:1
                  2⤵
                    PID:2404
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=9 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5488 /prefetch:1
                    2⤵
                      PID:3512
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=edge_collections.mojom.CollectionsDataManager --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --service-sandbox-type=collections --mojo-platform-channel-handle=5660 /prefetch:8
                      2⤵
                        PID:5080
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5680 /prefetch:1
                        2⤵
                          PID:2124
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5508 /prefetch:1
                          2⤵
                            PID:2856
                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=14 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6128 /prefetch:1
                            2⤵
                              PID:3800
                            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=chrome.mojom.UtilReadIcon --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --service-sandbox-type=icon_reader --mojo-platform-channel-handle=6444 /prefetch:8
                              2⤵
                                PID:4432
                              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=quarantine.mojom.Quarantine --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5432 /prefetch:8
                                2⤵
                                • Suspicious behavior: EnumeratesProcesses
                                PID:4444
                              • C:\Users\Admin\Downloads\_protected.exe
                                "C:\Users\Admin\Downloads\_protected.exe"
                                2⤵
                                • Identifies VirtualBox via ACPI registry values (likely anti-VM)
                                • Checks BIOS information in registry
                                • Executes dropped EXE
                                • Checks whether UAC is enabled
                                • Suspicious use of NtSetInformationThreadHideFromDebugger
                                PID:2684
                              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2164,15584971790780674163,14515461418761563998,131072 --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=4318 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --gpu-preferences=UAAAAAAAAADoAAAQAAAAAAAAAAAAAAAAAABgAAAEAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2996 /prefetch:2
                                2⤵
                                • Suspicious behavior: EnumeratesProcesses
                                PID:5968
                            • C:\Windows\System32\CompPkgSrv.exe
                              C:\Windows\System32\CompPkgSrv.exe -Embedding
                              1⤵
                                PID:2992
                              • C:\Windows\System32\CompPkgSrv.exe
                                C:\Windows\System32\CompPkgSrv.exe -Embedding
                                1⤵
                                  PID:4632

                                Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

                                Loading Replay Monitor...

                                Downloads

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                                  Filesize

                                  152B

                                  MD5

                                  ecf7ca53c80b5245e35839009d12f866

                                  SHA1

                                  a7af77cf31d410708ebd35a232a80bddfb0615bb

                                  SHA256

                                  882a513b71b26210ff251769b82b2c5d59a932f96d9ce606ca2fab6530a13687

                                  SHA512

                                  706722bd22ce27d854036b1b16e6a3cdb36284b66edc76238a79c2e11cee7d1307b121c898ad832eb1af73e4f08d991d64dc0bff529896ffb4ebe9b3dc381696

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                                  Filesize

                                  152B

                                  MD5

                                  4dd2754d1bea40445984d65abee82b21

                                  SHA1

                                  4b6a5658bae9a784a370a115fbb4a12e92bd3390

                                  SHA256

                                  183b8e82a0deaa83d04736553671cedb738adc909f483b3c5f822a0e6be7477d

                                  SHA512

                                  92d44ee372ad33f892b921efa6cabc78e91025e89f05a22830763217826fa98d51d55711f85c8970ac58abf9adc6c85cc40878032cd6d2589ab226cd099f99e1

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network Persistent State

                                  Filesize

                                  186B

                                  MD5

                                  094ab275342c45551894b7940ae9ad0d

                                  SHA1

                                  2e7ce26fe2eb9be641ae929d0c9cc0dfa26c018e

                                  SHA256

                                  ef1739b833a1048ee1bd55dcbac5b1397396faca1ad771f4d6c2fe58899495a3

                                  SHA512

                                  19d0c688dc1121569247111e45de732b2ab86c71aecdde34b157cfd1b25c53473ed3ade49a97f8cb2ddc4711be78fa26c9330887094e031e9a71bb5c29080b0d

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                                  Filesize

                                  5KB

                                  MD5

                                  c9b61ca98b083af33d447106a9f0aa59

                                  SHA1

                                  dc085aac10d849c07da19fe813d491a5c5066c48

                                  SHA256

                                  96e6941798584f19395b9a5471db29fbde42cff4b95d1b10c27c821f6242d59b

                                  SHA512

                                  efcaa14ae6bfdf6cda58859f1c5bee91947022e0e8fc4ec82f6298bbcbe56ce5e55d04718753c4813ece203936e871bd37e2bd81628c01380ed550ea0e8aab08

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                                  Filesize

                                  6KB

                                  MD5

                                  9569c12ae417ee98bdbc3582861f7bd3

                                  SHA1

                                  219514aec50d8656bb78ce6b95008e17f1cb71ac

                                  SHA256

                                  7870a9c26562656276542ffa8cbf3e1da90bf2bb5f00a9f6d81d2d1ae9bf422a

                                  SHA512

                                  4bab303b34c3b43a6a38df81a39acc44302e60632866c7d859aae789a6263d53249bfbcd7198bc77245f2bfe65c4364452e1075fa787277e3a2ea8e51e5d21cb

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

                                  Filesize

                                  16B

                                  MD5

                                  6752a1d65b201c13b62ea44016eb221f

                                  SHA1

                                  58ecf154d01a62233ed7fb494ace3c3d4ffce08b

                                  SHA256

                                  0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd

                                  SHA512

                                  9cfd838d3fb570b44fc3461623ab2296123404c6c8f576b0de0aabd9a6020840d4c9125eb679ed384170dbcaac2fa30dc7fa9ee5b77d6df7c344a0aa030e0389

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

                                  Filesize

                                  11KB

                                  MD5

                                  bd6b16cf42450e28a28cce55c4551ace

                                  SHA1

                                  d5c50e8e896a4513915493137a0da0651db6424d

                                  SHA256

                                  f92b84ca2737cb97b77b8878867b03b1b61dccf9e5eff64630040274d6837a93

                                  SHA512

                                  ab87c12052d24560e952420c1a2935fc0d75766e5f6ad8ededb805e04b906325c55ec886bb196df0a4005bf0382a4e2c4c0b7f90789d26bc7469ae900e5603a1

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

                                  Filesize

                                  11KB

                                  MD5

                                  da232c8d09430e57e851466984618a2c

                                  SHA1

                                  b9296308f870652232f08b4196e0144b9a1dfa73

                                  SHA256

                                  2f967b728715202dae24196242133fc737c61e4cfb155000256ee07da85c4b12

                                  SHA512

                                  b8c820335ff4db3144de4aec2da6fc66f32307d359f2b241677cb366d38799d843cfa0568a4b1370272b4b172c5b69b9f9cda3b177692d7f1b4acae63d5f9363

                                • C:\Users\Admin\Downloads\Unconfirmed 592166.crdownload

                                  Filesize

                                  15.3MB

                                  MD5

                                  5bc9c103742fa7e457e906e07832c395

                                  SHA1

                                  142c19a8f1dd419ce9c2f251cbc263b8abf476de

                                  SHA256

                                  9030098c9b2ecabe713d76727ccc2be79663d55716644446bb1482d948697e17

                                  SHA512

                                  1633349abd47715ed0804cb08798e9b12c862fe4239953de21481a07de502d13be74879e8ce7a962c1c68e1c967b47337095cc7458c40e702023d6f241536221

                                • memory/2684-79-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-85-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-86-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-84-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-83-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-80-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-82-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-81-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-78-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-105-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB

                                • memory/2684-77-0x0000000000400000-0x00000000019DB000-memory.dmp

                                  Filesize

                                  21.9MB